Cross-country ski exerciser



FIG. 1 is a perspective view of a cross-county ski exerciser showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof; and

FIG. 7 is a right side elevational view thereof.

The broken line showing of a woman in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a cross-country ski exerciser, as shown and described. 